Carbureter.



MI GOUD/IRD & M. Mmmssom. GARB'URETER. v

APPLICATION FILED SEPT, 22| i913.

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MAURICE GOUDARD AND MARCEL MENESSON, 0F LEVLLIS-PEERET, FRANCE.

caneunn'rnn.

Specification of Letters Patent.

Patented ingu Elli', $3215,

Application led September' 22, 1913. Serial No, 79,l90.

T0 all whom it may concern Be it known that We, MAURICE GOUDARD andMARCEL MnNNnssoN,citizens of the French Republic, residing at 39 RueFouquet, Levallois-Perret, Seine, France, have invented eert-ain new anduseful Improvements in Carbureters; and` we do hereby declare thefollowing to be a full, clear, and exact description v,of the invention,such as will enable others skilled in the art to which it appertains tomake and use the saine.

The invention relates to carbureters and refers to improvements indevices of the' type in question which are more particularly applicableto carbureters for fixed mo Y tors, but Which may be utilized in somecases for motors of other descriptions.

The principal object of the invention is so to construct apparatus ordevices of the kind in question, that they may regulate the motors orother engines to which vthey are attached, Without it being necessary toemploy additional devices 'for this pur-l ose. p The invention consistsgenerally in conibining with apparatus of the kind in question one ormore tubes, each adapted to form a nozzle, or some of which are adaptedto form nozzles and in providing a Well which is in direct connectionwith the lower portion of the constant level chamber, into which Wellthe lower end of the beforementioned tube or tubes dip, and in providingineens for causing the relative position of the aforesaidlower or entryopenings of the tube and of the level of the fuel in the Well to vary asa function ofthe velocity of the motor or other engine to which thedevice is attached, which means may be the suction produced in theaspirator tube by the motor or other engine. The constant level chamberfitted to the apparatus, and the reservoir for feeding such constantlevel chamber may be respectively, a. simple chamber (that is to say oneunprovidedwith a float) under the influence of the suction of the motor,and a lower reservoir connected to the aforesaid simple chamber by meansof a tube opening into the latter at above the height at which the fueltherein is to be maintained.

-The invention also includes, besides the principal arrangements justmentioned, certain other details of construction vvhich will behereinafter more fully explained.

lnorder that the invention may be clearly pressed to tion of the Figurel is a diagrammatic section in a.

plane or planes containing the respective -axes of the constant levelchamber and the nozzle; the carburetor being in this case fitted .vith asingle noaa aindrconstructed according to the invention, F ig. 2 showsanother forni ci' carburetor, provided with a single nozzle andconstructed according to the invention.

ln constructing a carbilreter according to the invention and asillustrated in the accompanying drawing at Fig. l a is the constantlevel chamber, o is Well which is in direct communication with the lowerportion of the said constant level chamber a. This Well is of such depththat, when the fuel in the constant level chamber o is at its normalheight there is no liability of the said fuel overflowing the edges ofthe Well.

c is the aspirator tube.

Z is a tube constituting a nozzle, the lower end of such tube beingadapted to dip into the said Well 2'), and the upper ing into theaspirator tube c.'

di is a line perforation in the tube d, which perforation may upper orlower portion of the said tube or in Sonie other suitable position.

` Means are provided for varying the rela-l tive positions ci the entryorifice elV the tube d and of the level of the fuel in the Well I), as afunction. of the velocity of the motor or other engine, Th's means maybe the suction produced in the aspirator tube c by the motor or otherengine in connection therewith. The aforesaid ineens may comprise adevice for causing the tube al to be displaced vertically While thelevel of the fuel 'in the Well o remains constant and may consist, asshown at Fig. l, of an elastic diaphragm e which is so fitted andarranged that itis subjected on one of lits faces to the atmosphericpressure and upon the other face to the suction produced in the saidtube r. The nozzle is so attached to the said diaphragm, for instancebypassing it through the said diaphragm and xing it thereto that the.tube itself is raised and degreater or less extent as a funcsuctionproduced in the said portion openbe located at the.

As an alternative means may be employed-` for modifying uie'height @lthe level or the fuel in the well ZJ While the tube ci remainsimmovable. For instance and as vshown at Fig. 2, a conduit f may be pro-,.vided, the sectional area of which may be Letters latcpi; 'or theUnited States capable of regulation, which conduit is so arranged as toestablish a communication between the aforesaid tube c and the upperportion of the constant level chamber a,

the seid chamber bein@ either made air ti ht b or provided with aperforated cover fur-` nished with means. such as a small opening g,(Fig. 2) for establishing a communicetion between 'the interior of thecha-in` loer and the atmosphere. yl`he opn may be so formed that itsdimensions can be regulated. In other cases means may be provided forenabling the tubo ai to he ver# tically displaced and foil modifying theheight of the fuel in the well Z) at the same time.

With this construction when the motor vto which the carburetor is fittedis working normally, the nozzle of the carburetor acts in the ordinarymanner, while when the speed of the motor rises, the relativo posi.-tions of the entry orifice of the tube o7 and of the surface of the fuelin the wellb is modi fied, owing to the increase of suction. produced inthe upper portion of the const-ant level chamber a. The extent to whichthe said opening clips beneath the surface of the fuel lin the said wellconsecuientlg.r diminH ishes, until it entirely disappears on even be'-comes negative. The supplyY of fuel tothe nozzle therefore din'iinishesto a greater and greater extent until it is entirely out olf when thelcveloi" the fuel in the well fel below the entry orifice of the tube Thoccurs when the maximum velocity selected has been reached. the extentto which the tube d dips into the well o being regulated accordingly, asshown in the example at Figs. l and 2.

`We may combine, with the foregoing ar rangements, one of the ordinarysystems usuali;rA employed for regulating the speed of fuel to theconstant level cliaino r e.

It will be understood that the invention is not limited in any way tothe par .icular method of' carrying it into effect willich has been moreparticularly described with refer ence to the draw modificationsfalling; `within the pr thereof.

What we cillin'- i desire to en America l, .inf c ling y" nog, but thatit inclu es all4 combination of Licence constant level chamber, a wellin direct communication with said-chamber and subject tov atmosphericpressure at the -top thereof, a tube forming a nozzle the lower end ofwhich tube is adapted to dip4 into'the fuel in the well vand means formodifying as a function of the velocity of the motor to which the deviceis attachedthe extent of immersion of the lower orifice of the tube inthe fuel 'in the well substantially as described.

f2. In a carburetor the combination of a constant level chamber, a wellin direct communication with said'chamber and Isubject to atmosphericpressure at thetop thereof, a tube forming a nozzle-the lower end ofwhich tube is adapted to dipinto .the fuel in the well and meanscontrolled by the suction produced in the aspirator tube connecting thecarburetor and the motor for modifying as a function of the velocity ofthe motor to which the device is attached the extent ofinimersion of thelower orifice of the tube in the fuelin vthe well substantially Y y asdescribed.` y

3. ln a carburetor the combination of a constant le'vel chamber, a wellin direct ccmmunication with seid chamber and subject to atmosphericpressure atthe top thereof,

a tube formule` a nozzle the lower end of vwhich tube is adapted to dipinto the fuel in the well, and means controlled by the suction producedin the aspirator tube connec+- ing the 'carbureter and the motor towhich the device is attached for relativelyv Varying the level of fuelin the Well With'iespect to the lower end of the nozzle to an extentproportional to the Velocity of the motor substantially as described. Y

Ll. ln a carburetor 'the combination of a constant level chamber, e.Wellin direct communication with said chamber and subject to atmosphericpressure at the top thereof, .a'tuoe forming' a. nozzle the lower end ofwhich tube is adapted to dipinto the fuel in thervell, and means exposedto the suction of the motor to cause the. relative height of thelevel-.of fuel in the Well and the lower end ofthe nozzle'to rise andfall to an extent proportional to the velocity ofthe motor substantiallyas described. 'j

5l ln a carburetor, the combination of a. constant level chamber, a Wellin direct communication with the said chamber, a tube formingle.nozzlmthe lower end of which tube adapted todip into the fuel in thewell, means controlled by the suction prof frice is attached, forcausing the nozzle to be displaced .ei'ticall, means for causing the oecommunicated to the surfe-conf the the c 'L ut i n 1 .JE

ieu tric ici-.ver ci the ytube .-n produced in tlio'saiilA aspiratortubo.:

` ,fel chamber so dips into the fuel in thewell varies proporveonstanflevel' chamber, a Well in direct communication with the said chamber, atube forming a nozzle, the lower end of which tube is adapted to dipinto'the fuel inthe Well, and the upper end of which is exposed to thesuction of the engine, and means for causing the suction produced in thesaid aspirator tube to be communicated to the surface of the fuelV inthe constant level chamber so that the dept-h to which the lower end ofthe tube dips into the uel in the Well varies proportionately to theVelocity of the motor substantially as described.

7. 'in e eerbureter, the combination 'of a constant level chamber, aWell in direct com-v munication with the said chamber, a tube forming anozzle, the lower end of which Atube is adapted to dip into the fuel inthe Well, and the upper end of which is exposed to the suction of theengine, means for causing the suction produced in the said espiratortube to be communicated to the surface of the fuel in the constant levelchamber se that the depth to which the lower end of the tube dips intothe fuel in the Well Varies proportionately to the. velocity of' themotor, andan opening the sizeof which may be -regulated between theatmosphere and the top of the space in the constant level chambei`substantially as described.

' /l/n testimony whereof, We affix our signatures, in presence of twoWitnesses.

MAURCE GOUDARD. MARCEL MENNESSON.

Witnesses:

HANsoN C. Con,

PAUL BLUM.

